It seems all the readily available pictures of the IA-1 mainboard have gone missing. There used to be a link at www.linux-hacker.net/ipaq. As I don't have an open IA-1 to refer to, hopefully this will help.
Anyway, on the CF connector, dead-center, are the VCC lines. There are two, at pins 13 and 38 (thankfully, they are right next to each other on the connector). You will need an exacto knife and a soldering iron to lift the leads (do *NOT* cut the PCB trace). Once you have the leads lifted, tie them together with wirewrap wire and solder the connection. I put a little hot glue around the connection, but the leads are fairly stiff on their own.
Next, look for the unpopulated serial header. It's just above the CF slot. Pin 10 is a 5V Vcc line, ostensibly for use with a level translator. Unless you are planning to populate this header, this is a good place to tie in. On my board, these were noted on the silkscreen, but it's the right-most upper pad looking from the rear. Solder the other end of that wirewrap wire to that pad, and you should have a 5V Vcc for your CF socket.