Link of Stock Rom:-http://www.mediafire.com/folder/w3cbtjr2g4p91/iris_458q.
Procedure to install stock rom are as following :-
1. Download attached files and unzip the folder in your PC.
2.Extract it to a folder & Install drivers
3. Run SP Flash tool as an Administrator.
4. Load Scatterer file
5. press F9 or firmware>upgrade on flash tool.
6. connect your mobile in switched off mode.
7. wait for the SP tool procedure.
8. Green circle pop-up and say download complete.
9. Restart your phone.. VIOLA ur phone booted. Boot loop problem solved.
and you have got your original os back.
Note :-if you find this not well explanetory then refer to this linkhttp://forum.xda-developers.com/show....php?t=1982587