danjayh: Unfortunately, the game looks for the folder where it's at for saved games. You can't move the "saving" somewhere else. What you have to do is move the entire game folder to your main memory.
I'm really surprised it went like 1.5 mins on your end while saving on a storage card but I'll see what I can do and get back to you. What device are you using btw? I'm using an h1910 and a panasonic 256MB SD card and the game saves for like 15 secs only.