Windows 7: Internet sharing - Oh why so difficult!

Good day people, I came to you guys with a normal problem on 7.
I already searched here to find a solution but all I found was made by me already.

So, let me introduce the problem:

First my specs: Both PCs are using Win 7 7100, in the machine with internet, I have an Core 2 DUO laptop, 2Gb ram and 150Gb HD, onboard ethernet, the other one, a desktop, an Quad Core, 2Gb ram and 150Gb HD, onboard ethernet, all hardware is ok in both.

I have those 2 computers, linked by a ethernet crossover cable, the laptop with an USB motorola cable modem with shared internet, and the desktop eager for some internet. The problem is that, in one moment, I finally share the files, using static IPs (192.168.0.1/192.168.0.33), but can't share the internet by any means.

I was using XP on the Desktop and I could share both internet and files, so, it means the config on laptop (the internet provider) was ok.

I am really clueless how to do this internet sharing thing and really really disapointed with how difficult is to set an network with both 7 and Vista. My God, instead simplify things they just messed up all in order to raise security and to "try" to simplify things??

I already tried HomeSharing, but not worked for me, I had password problems, or computers not finding each other.

So I am asking if someone could point me a way to try to solve this thing who drove me insane yesterday!

Thanks in advance

I've not done this since the days of Win2K, so I don't know if this will help, but a quick google found this reference:

Step by step Internet Connection Sharing (ICS) setup in Vista | Windows Reference

Thanks, but I already did that. That's the way I was sharing internet with the XP
Unfortunatelly it is not working on Win 7
Also, just for info, I tested the internet sharing with my XBOX360 connected to the laptop, and worked just fine.

I can't believe on this, last time I stay up in the night til 3 in the morning trying to fix this, no lucky, yesterday I got home with all those tips I got here and, guess what, the damn computers where working, sharing files and internet normally, like nothing had happened the day before... Guess it was the dwarves on my vase who fixed while I was working :P
Anyway, thanks, problem solved by holy intervention!