ok well since you got no answers yet from any of the experienced guys around here ill try to give u my advice. just to warn i havent even got a pacman yet and am still researching them to get as much info as possible so they don't die but i know a good bit from the research.

ok for you first question fish are rather fatty and should be used as a treat only and not really a full time feeder, although they are better then mice for sure so they work if there the best if he will eat. i would try nightcrawlers and just dangle them infront of his mouth untill he eats it, because im sure he eventualy will if u entice him enough. also dust the nightcrawlers in calcium powder for 2 reasons, they catch the frogs eye better and second, there healthier for it. also a question from me how did u manage to get the fish on tongs lol? u kill it and put it on or what cause i thought ud just put it in the water dish and let him find it.

but ok second question, very common for them to burrow and id dig him out for feeding just like your doing if hes fully burrowed. if his head is still sticking out then just dangle the food infront of his face.

third question, as far as i know you should put both hands under his feet so he feels like hes on ground but then he can jump out of your hand so you gotta keep him low to the ground and put him in wherever you want him.

and fourth question, just have a water dish out that he can fit in so if he ever really wants to he can go in it and the dish will also help the humidity. just mist the tank everyday to keep the humidity way up there for him since thats what pacmans need.

5th question, id buy some good tongs with plastic balls at the end and a bit of plastic around it to keep it from hurting him.

6th question, definately wouldnt have to pacmans in the same tank. you could put them together for a bit after feeding them both but not full time because you forget a day feeding him and ull come back to one pacman gone. also once the pacmans get big they will need a whole lot of room so 2 in the same tank would probably be crammed unless the tank is huge.

well i hope this all helps u out and there could be more stuff i didnt mention because i dont know but this should help you out a bunch! good luck with the pacman keep me updated on how its doing!!!