[General Woundwort]

Well, I have to warn you ahead of time that you're probably in for a frustrating experience. Depending on how complex the mods you want to combine are, you've got a lot of cross-referencing, re-writing, and de-bugging to do. Each mod author tends to write their changes as "stand-alone" (unless they factor in things like the Image Mod for their graphics), and often two modders will have conflicing ideas on how to do something that will have to be decided between or reconciled - and these changes often occur over one or more game files.

Your best bet would be to look at the features you like in each mod, and do your own mod to incorporate/replicate those features.