Windows 7 CD, no 64bit option?

I think my CD is a corp CD from my dads company.
Even so, you would need a MAK key or KMS server to activate the corporate version.
 

My Computer My Computer

Computer Manufacturer/Model Number
Self-Built in July 2009
OS
Windows 7 Ultimate x64
CPU
Intel Q9550 2.83Ghz OC'd to 3.40Ghz
Motherboard
Gigabyte GA-EP45-UD3R rev. 1.1, F12 BIOS
Memory
8GB G.Skill PI DDR2-800, 4-4-4-12 timings
Graphics Card(s)
EVGA 1280MB Nvidia GeForce GTX570
Sound Card
Realtek ALC899A 8 channel onboard audio
Monitor(s) Displays
23" Acer x233H
Screen Resolution
1920x1080
Hard Drives
Intel X25-M 80GB Gen 2 SSD
Western Digital 1TB Caviar Black, 32MB cache. WD1001FALS
PSU
Corsair 620HX modular
Case
Antec P182
Cooling
stock
Keyboard
ABS M1 Mechanical
Mouse
Logitech G9 Laser Mouse
Internet Speed
15/2 cable modem
Other Info
Windows and Linux enthusiast. Logitech G35 Headset.
Is this Win7 Enterprise version, as it has a different volume licensing scheme but should allow either 32- or 64- bit with each license as does Win7 retail.

If it isn't Enterprise, then you can for sure find a Win7 64 bit installer for your version and it will work with the retail key. If you cannot find your version, we can help you unlock all versions by extracting the ISO, running the ei.cfg removal tool, then burning an all-versions DVD to install your licensed version with your key.
 
gregrocker is right.

1. Make sure your computer hardware can run 64 bit.

2. If it comes under volume licensing, it depends on the company who purchased the license, what they will distribute and last but not the least point; which type of License. I am a basic MS partners network member, if I buy a "Volume licensing kit" ; I can distribute the OS version as I wish. Obviously, some company supplies one version only; because:

Say, I paid ABCD USD for XYZ number of licences (not keys); I am allowed to use it for XYZ number of PCs only (of any version, 32 or 64 bit), Activating any version will "use up" one license. Definitely, if the person (whom I am providing the Installation Media), install two versions in two separate computers, I will loss two keys (but I want to allow only one). This is the basic reason to "control" the end user some how.

Its very important what is written over the media : DVD in your case (Not CD ;))


Offtopic though:

MS "tweaks" in different flavors of their distribution: My Win 7 Ultimate (Signature Edition) Launch party DVD (Obviously retail) asks for the key everytime I format it. I install and format only in one laptop (HP/Compaq), activate it through internet: the rearm count remains the same. In contrast, last time, I used my other Win 7 DVD (Signature Edition 64bit got some scratch I guess, it was refusing); that I got through another program (also retail), didnt asked for the key! I had to change it before activation.
I never installed my MSDN versions till now; Bare Foot can highlight how it appears LOL
 

My Computer My Computer

Computer Manufacturer/Model Number
COMPAQ Presario Laptop
OS
Windows 7 Ultimate 64 bit, Mac OS X 10.6
CPU
Intel Pentium Dual Core @2.0GHz
Motherboard
Compaq Generic
Memory
12GB
Graphics Card(s)
NVIDIA Graphics For Mobile 512MB VRAM
Sound Card
IDT High definition Audio
Monitor(s) Displays
Laptop LCD Display
Screen Resolution
1280*800 Bright View Widescreen
Hard Drives
500 GB Primary Master@7200rpm + 1 TB External HDD
Cooling
Direct ; generic fan
Keyboard
Generic Laptop Keyboard
Mouse
Touch Pad
Internet Speed
3.1 Mbps wireless Broadband
Other Info
Generic Dock
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