Upload new Text in VV12 For Note for recipient.

Hi Team,

I am searching for solutions to my problem, need to upload new text in note for recipient of output condition record (VV12) at sales order level, for more than 50K customers, I was checked with LSMW but not succeed, fields and table are not recorded for the uploading text details.
Is there any tcode or program for Mass uploading text?
Details
Tcode VV12

Condition type-ZZZA (Example)
Condition table- Order type / Sales org / Customer

Thanks In Adv.

Reg/Santosh