Start Mii Maker to open HBL?
//EDIT: To help a bit with your confusion:
- fw.img - A thing used a decade ago when no real CFWs existed.
- Haxchi - A CFW including signature patches.
- CBHC - Coldboot Haxchi.
- Tiramisu - A firmware able to run homebrews without the need of signature patches.
- Homebrews - Tools written by individuals in their free time, not using the Nintendo SDK.
- Warez - Illegaly optained games.
So Tiramisu is perfectly fine as is for homebrews only. Now in case you're talking about warez instead: There is a signature patcher for tiramisu available, linked at the official guide. You just put it on your SD card and that's it!