If u are wondering if it is possible to create .sis / .sisx and decompile .sis / .sisx 3rd editions OS9.x... the answer is YES

Feature :

- Open and Import now support SymbianOS 9 (New)
- Support UIQ 3 (New)
- Extract SIS support SymbianOS 9 (New)
- Generate Seft-Signed Certificate Tools (New)
- Get SIS version and UID information from a sis file (Currently not support SymbianOS 9)
- Multiple popup texts
- Faster than old version (v1.4)
- Add LOG tab
- Support multiple language dependent files
- Support AddOn Option
- Support Embedded SIS
- Support multiple platform (s60, s80, UIQ ...)
- Support Khmer and English Interfaces
- Fixed some bugs
[Only Registered Users Can See Links]
download at ([Only Registered Users Can See Links])

there is one proublum