Do Preinstalled File get erased if I install new expansion packs?

[pboman]

Hello,  I have a PSR-SX900 that seems to have 1 GB space limitation in YEM to install other packs.  If I make a new install does it remove the packs that came preinstalled when it reformats the memory?  If so I would need to reinstall those packs also...  If the PSR-SX-900 has 4 GB of internal memory, why am I limited to only installing 1 GB worth of expansion packs through YEM?  I get an error message if I try to add all the packs that I have saying there is not enough space even though it only shows me trying to export 1.2 GB of file space...

[BogdanH]

Internal memory is used for styles,registrations, midi & audio recordings, pads, etc. Voice memory is separate place used only for voices. When you create a pack (for SX900), you will usually only be limited by number of voices in your installation file: their total size can be max 1GB. Number of styles doesn't really matter: 1st, they are small (compared to voices) and 2nd, they get installed in internal memory (4GB).

When you install ppi pack, complete previous pack is deleted: including pre-installed packs. If you like something in pre-installed packs, then you can download them at Guets are not allowed to view links. In order to access the links, please Register or Login web page (look at the bottom of the page) and then include individual styles/voices in your custom pack.
There's an option to install addition content to pack already installed in your keyboard -see qpi (Quick Pack Install) in manual- however, it doesn't work the way you probably expect.

Bogdan