XTs and large hard disks

Hi everyone! I have an old Portable PC that I put a 2MB memory card in, along with an EGA card, sound card, and some other stuff. I'm doing my best to max it out. Anyway, I'm having some trouble with hard disks. I have two hard disk controllers: a Seagate ST02 SCSI/Floppy controller, and a Juko Labs D16-X IDE controller. Now both of these cards work okay, except they recognize some strange sizes for the disks. The only disk that seems to show up correctly is a Quantum LP105S...the others I tried, all bigger than a gig, are either not recognized, or recognized with the wrong size. This is also the case with the IDE controller - everything is recognized at 10MB. I purchased an LBA PRO card for my machine hoping to overcome the large disk size problem, but all it does is freeze the machine...however, if I remove the 8088 and replace it with a NEC V20, I get the banner for the hard disk drive card, and THEN the machine freezes. So my questions are: 1. Does anyone know a good solution for putting a large drive in an XT, while still leaving it an XT? 2. Should I leave the V20 in? I've heard it has compatibility issues with some programs, but I'm not solid on my information. Regards, Julian