this will probably help you
heres a thread on dsmtuners, people have posted and asked alot of questions and stuff in there. you can ask too if you get stuck.
AWD Conversion/Swap Guys Enter Here - Advanced. [Merged 2-07] - DSM Forums
read through all of this and youll have the basic idea, its easier to understand when you actually do it than reading it.
two good writeups with a list of parts youll need. you can reuse your struts and shocks.
AWD Conversion: Picking up the AWD Shell - Automotive Articles .com Magazine
2G (1995 – 1999) Eclipse/Talon AWD Conversion