I have most of them, let me think...
Melieu 0 and 1st Survey useless unless you want a campaign in M0.
Central Supply Catalog might be good for equipment ideas.
Starships/Naval Architech Manual wouldn't help much and the deckplans are horrible.
Aliens book includes minor races, all new? Don't get it looking for Alsan.
Emperor's Arsenal like CSC would be good for source of weapons of all types. Beware the battledress though that gets the TL's wrong.
Pocket Empires regarded as one of the best T4 books by many.
Fire Fusion & Steel for T4 is only for T4 of course.
Emperor's Vehicles I don't have, it might be of use to you.
Imperial Squadrons I don't have, it might also be of use.
I don't have any of the adventures.
TA9 has nearly 40? ships of the Solomani Rim with lots of fluff.
TA 7 I thought I had but can't find it on my hard drive yet...
I'm sure others will pipe in soon. As for porting to MGT, it should be as easy as CT, much easier then MT or TNE. T4 came after MT, but was based upon the earlier CT like MGT was.