Just install the card and drives, when you boot into windows (off the current IDE drive) give windows the LSI drivers for the card. Then you can partition and format the drives, and copy the data over ...
Depending on the model, a Compaq Presario might use a SATA hard drive or an IDE drive. The former is found in most models released after 2003, and the latter in earlier PCs. Replacing an IDE drive is ...
As already mentioned, there is a slightly design flaw with the 3.5″ IDE section which means you do have to be careful to make sure you are putting the drive in the right way up, and also the molex ...