I 'll give you some hints:
Work with the CVS version.
Go to "Settings/Configure plugins/Compiler".
Create a copy of an existing compiler (say GCC).
Edit everything (advanced options especially) for the new compiler you want to support.
If you succeed, go to "Settings/Import-export configuration" and export the "Compiler" settings to a file.
Send me this file and I will see it added in the main distribution, giving you full credit

Yiannis.