@Franky Ng Hey I'm new too and you might get much better answers from some Pro's here, but at least I try to give you some quick tips lol
Consider using iTunes or downloading an App to sync Pics with your Computer, I can't tell you which app will work.
Since iPad 2 isn't JB you can't use all the good tools.
But I found a tread which might answer you question;
Be sure you have moved all pictures from your iPad into iTunes first, by syncing them to iTunes. Then, you should remove the pictures currently in the Camera Roll (Photos), so you won't be duplicating everything. You can do this by connecting the iPad to your computer and then going into iTunes, and under "Devices" on the left hand side of the screen, click on your iPad name. A window will open up with tabs on the top. Select "Photos", under "Photos", un-check "Sync Photos from..." , and sync, this will delete all of the photos on the iPad
You need to setup a folder, on your PC under "My Pictures", such as "iPad Pictures" and make all of the folders you want, with the pictures you want in them (copy, move or drag and drop, your choice), under that folder. Then go into iTunes, under PHOTOS and select "Sync Photos from" and change "My Pictures" to "Choose Folder" and then choose the folder you created "iPad Pictures" open it and select the folders you want to sync to the iPad. Then sync them.
If your jailbroken, download PhotoAlbum+ from Cydia, and then you can make folders and move photos where you want them.