Import data into SQL 2008 R2

Hi,

I have a report in SCCM , that results in data of a SCCM client like host name, make, model, CPU, RAM etc….some fields that we use. Then there are few dashboards that are created using this data, in SRS, kind of graphical repesentation for business. Now I have task at hand, to include Work Group/Unix servers information as well into these dashboards. As SCCM doesnt manage them we plan to add their data manually. I am thinking of below to achieve this, but appreciate your comments/suggestions, either in general or from past experience of similar executions 

1. Create a temp table, which takes all values from “all in one”  reports (then automate to update this temp table on some frequency)
2. Enable customer with some forms or “Import wizard of SQL” to load data of Unix/WG machines, into above table, which will fill exactly same fields that I need for report.
3. Modify SRS dashboard a bit to represent new category etc.

2# Point seems crux and looking for real suggestions here on what tools best suits and stuff like that. Do you recommend Excel  or any other HTA kind of tools to enter data into specified SQL Table

Thanks, Vasu

Vasu