PDADB.net do not specify the herlad being able to support SDHC so you probably won't be able to use one.
if they found a solution to it, it would probably be posted in the Herald section in the forum.
I suggest you go there and either post a thread asking about it, or search for a thread discussing the issue.
generally, and it's only a suggestion of course, you should ask questions regarding specific devices in the specific device's forum since most problems and solutions concerning a specific device are probably posted there already and since people in that device's section are more familiar with it.
about the apps, yes, you can just copy them.