Casio SK-5 Memory Expansion Question!

[Paulappaul]

Hi, first time poster, circuit bending noob. I've read that you can expand the Casio SK-5's RAM to 32x its normal capacity giving you a greater number of sampling slots then 4 "short" or 2 "long" samples. I was wondering if it is possible to mod the device so that rather then having a bunch of samples you could bounce say, a minute long drum track off the sampler. I love the effect the Casio gives to recording, but have always found the sample time limiting, basically I am wondering if there is a way to expand the sampling time or use the sampling circuit and the onboard mic (or even plugging an external mic) to record entire songs.

Thanks!
Paul

[Paulappaul]

here is the link to the memory expansion link I found:
http://www.warningwillrobinson.com.au/index_files/SKexpansion.htm

is the keyboard hotwired to only record at most like 7 seconds?