Charles,
There are several solutions for printing the business cards that would allow you to design and print your business cards right from PSE without any templates.
One would be to create a "picture package" with 10 - 2X3.5's. You could use the 8 - 2.5X3.5's as a starting point but would need to add the vertical and horizontal pitch, (the space between the cards), since I believe the paper you have has a "break-off" in both directions and change the 2.5 to 2", the standard business card size. (There are detailed instructions for creating your own picture packages in Help).
The other way is to buy plain (or colored) card stock instead of specialty paper. The cost of cards drops considerably. I print quite a few business cards in the manner and it is great using PSE to design them. (have a look
http://home.comcast.net/~peted1/wsb/html/view.cgi-image.html --SiteID-978458.html ) ..
Once the 2X3.5" card is designed you do need a printer that is capable of "tiled" printing so you can have just the one card open but print 8 or 10. Or if you happen to have any program that handle this task; I use MS Publisher and that allows me to set the margins and pitch. For 10 cards it is .75 top and bottom and .5 side margin with the pitch set to zero on H and
V.
Print and with a paper cutter, first cut the margins (.75 off the top and bottom and the .5 from sides). Then it is a simple task to cut them into 2" strips (trailing edge at 10", then 8", then 6" etc), gather those together and cut at 3.5, and you have a nice neat stack of 10 cards. Once you do this a few times it goes very quickly.
I don't mind sharing that this is a nice side business because a lot of home businesses cannot afford full color business cards, (the design and setup that is charged is high too). The only investment is a good 12" paper cutter to get a clean cut. (Make sure you know the maximum weight paper that your printer can handle and buy card stock accordingly at a paper supply). A printer with rear manual feed is best but I think some of the newer printers work ok with card stock.
PeteD