New find: Headstart Explorer

I came across a neat little PC/XT clone on the weekend, a Headstart Explorer (made by Vendex according to some Web info I found). It's an 8088, with an unusual level of integration: mono/CGA video card, modem (300 bps?), serial port, parallel port and external disk drive port all on the motherboard. There's an internal 720K 3.5" drive, and a bay for an MFM drive. Comes in an unusual pseudo-portable case, where the hinged keyboard folds up and stores upside down on top of the case. There's a single ISA slot under a cover on top. Apparently, there was a monitor available that came with a custom stand that fit neatly over the desktop case. It has several features I've not seen before: the folding keyboard, a mono/colour switch on the video output, and the PS/2 style mouse and heavy integration on a clone of this vintage. Also, as far as I could tell, there was no trace of the manufacturers name anywhere. I had to take the system to pieces to find the Headstart Explorer name on the PCB, and the name Vendex wasn't on it anywhere. Does anybody have the custom version of DOS that came with this thing, that supposedly included a very annoying shell program, or any additional info about this beast? I didn't get any manuals or docs with it (why oh why do thrift stores never keep system components together?) and the HD was missing. Thanks, Mark Gregory