Wireless Help with Dialup Internet

Ok i've got a problem

I've got a wireless router and a wifi card for the carpc

But cause my car pc hasn't been finished my sisters been using it for wireless internet.

I've got dial up so i'm using ICS to share the internet but i can't do ICS and FILE SHARING by itself so i have to switch it from file sharing to wireless internet but the problem is it takes so long to switch from one to the other.

How can i share my files on the car and also share the dialup internet for the laptop at the same time?

I really need help :(

I'm not using a crossover cable but would that help at all?

When i share files i can't click ICS as it says the ip address is conflicting or something along thoese lines.

I really need both working i know the wireless router wasnt made for this so please help.

If you're willing to use a wired connection between the 2 computers, you could either use a crossover cable, or you could get a USB File Transfer cable. I used a 50ft. crossover cable for years to share Internet/Files between 2 computers when I was to broke to buy a router/switch.

That doesn't help me as the Laptop is on the other side of the house far far away.

There must be some way to share the dialup internet and the files at the same time.

Please someone must know????