Installation of win7 and then win xp

Hi!
I have already installed Win 7 in C: drive of my system with escan antivirus last user pack(it means i cannot reactivate it till expiry date). Now i installed win XP in E: drive of system. Here problem is while booting it does not ask me to which win to boot and so I am not able to boot win7 and use all my existing software. One solution was to reinstall win xp in c: drive and then win 7 in E: drive but by this I will lose all my project from c: drive.
So can any one help me pleas, solve this problem as early as possible.
Thanks in advance.
Shital.

Install EasyBCD 2.0 beta after doing quick forum registration there to use beta.

You'll also need to install Net Framework 2.0 to run Easy in XP.

Add Win7 on Easy's Add/Remove tab by Name, Type, and correct drive letter, Save, Restart.

If this fails, you'll need to restart Win7 to install Easy there to Add XP which works better. This is done by marking Win7 active in XP Disk Mgmt., then boot Win7 DVD Repair console or Repair CD, clicking through to Recovery Tools list to run Startup Repair up to 3 separate times with reboots until Win7 starts.

put a master jumper on the E drive and cable select C or slave it

downloads Hirens boot cd 2.6 onto a poweriso image then pop in and it will find data and allow you to back up all files to disk on usb device