Creating an export table

Well, what do u think the Export Table Values in the PE-Header are for?
You can patch in an Export table,but i guess you wont be able to get hold of any Exports that easy then..

Why dont u put your stuff in some DLL and inject some code to load that DLL instead?
This would enable you to code all stuff you need in your dll without any relying on the original code, just create the proc and inject some pseudo dll-loader code in the apps context..

cheers