irec - salary basis component

 In Irecruitment while giving offer we give salary basis "proposed salary" and "other compensation" details using ICD. 

Oure requirement has  compensation structure like

Gross Salary - Basic + HRA + Variable pay

Other benefites - Car allowance, shifting allowance 

The problem with irec, as we refer the salary basis we can enter only one gross salary component (i.e) basic salary and there is no option to capture the other components like (HRA and Variable Pay).

But in the salary admin page we have option to capture other components also, is there any way we can do in the offer page using extension replicating the same  in salary admin page.