On the subject of a permanent seat in the PCMCIA slot ... I simply on the two long sides of the ExpressCard a small 2mm wide double-sided tape applied (but the liner it can be!). She therefore puts really enjoyable fixed in the slot and can also be quite normal eject on the eject latch. Alternatively, a very slim fitting fabric tape or similar should just work.
Best investment in my Schlepptop long :)