Hi Dragon,
When we talk about LSMW it is in the area of a Functional man,
The known alternative to me in your case is an ABAP program based on recording done through a Tcode SHDB. (also called as BDC program). This is purely an ABAPer's job.
After development, the ABAPer gives you a Tcode and a a Template (.txt or .xls) carrying field names, in which you need to arrange your data for Orders to be uploaded. Then, just run the Tcode, refer to the File you've arranged and Execute.
This is very easy to use when compared to LSMW method (Yes, after developing such program)
Jogeswara Rao K