What you will need:

AV Devil 2

Hex Editor: Everybody has their faviourite

AVG

Okay. I'm going to give you a basic tutorial on how to do it using AVG. I'm not on Windows at the moment so i'm sorry but i can't provide screenshots (Will probably add them at a later stage if requested enough).

::Let's Begin::

Install AVG, update it and TURN OFF RESIDENT SHIELD!

Open AV Devil 2 and where it says "Source Datei", browse for the stub of the malware that wants to be made undetectable.

Press okay in the second message and a box should pop up. DONT PRESS OKAY until you have re-enabled resident shield.

Press okay in the pop up box and it will scan the malware for offsets.

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Once it has scanned you will be able to see the detected values.

Open up a hex editor of your choice and change them.

Re-scan

Last time i checked AVDevil 2 was working fine with avg , avast , nod32 , antivir, norton

when i do this, once i press ok after turning on the shield, AVG pops up alterting me of the infected file. I leave that box there and Av devil just says scanning offsets, and sits there for minutes. How long should it take?

AV Devil is retarted.
It was already retarted when I tried it, and that was more then two years back.
If you are searching for offsets, split the file and try manually.

yeah, thats the way i normally do it, i was just hoping for a quicker lazier way >_>; ohwell.

Please can you post some screenshots i would most appreciate it