After some struggling around I have now successfully created my first small program in HI-TIDE. I had missed I was looking into the pic1267x.h file when finding defs for my code. The program I tried to compile was the simple debouncer example from the PICkit FLash Starter Kit though it was not specifically written for the 12F675 which I have here. Thus I had to change some of the defs used, e.g. RA5 to GPIO5. I got help from the HI-TIDE Forum that I should look in pic12f6x.h instead which made it much easier to get it to compile:-)
Also solved the powersupply issue. Just take a 220V USB charger, gives a nice 5V with 500 mA!