If I may add my way (no pics)
1.Open Runescape and type in your username and password. Then minimize the screen
2. Open up another runecape page and type in your details.
3 Take the minimized screen and shrink it so that the login from both screens are very close to each other.
4. Click log in on the top page, then quickly on the bottom and bam your logged into two accounts.
Um.. You can still simply log in on the same world by clicking it to log in at the same time with multiple names.
Just FYI, this can be detected very, very easily.
This is a complicated version...
Here is a simple version
- Simply DL Swiftkit, and load up runescape on a web browser
- Log in on both accounts
- Select a favourite world on both programmes
- Log in on both accounts QUICK (CTRL+Tab)
- Wallop. You've multi logged.

