It exist, but it's incredibly pricey (131$)javascript:emoticon(':shock:') Manufacturer Part No.: 37L1511 Overview: The Portable Drive Bay is designed for maximum flexibility and usability. It offers an UltraslimBay enclosure in an attractive portable package that can be attached to the ThinkPad PCMC...

Boissez wrote: I can boot of a regular 16-bit PCMCIA adapter but loading windows @ 1 Mb/s is just too painful...

You can boot from PCMCIA in a T4x laptop? Which one? What BIOS?
I thought it was impossible from my T40