Treat Envelope as an load case

Hi everyone,

 I am working on STAAD.Pro load combinations which is normally done as:

 1 Dead load (DL)

2 Live load 1 (LL1)

3 Live load 2 (LL2)

4 Wind load +X (WLX+)

5 Wind load -X (WLX-)

 6 COMB1 (DL+LL1+WLX+)

1 1.0 2 1.0 4 1.0

7 COMB2(DL+LL2+WLX+)

1 1.0 3 1.0 4 1.0

8 COMB3 (DL+LL1+WLX-)

1 1.0 2 1.0 5 1.0

9 COMB4(DL+LL2+WLX-)

1 1.0 3 1.0 5 1.0

 Instead of doing as above and to reduce the number of load combination I want do as method 2:

 1 Dead load (DL)

2 Live load 1 (LL1)

3 Live load 2 (LL2)

4 Wind load +X (WLX+)

5 Wind load -X (WLX-)

6 COMB1_Envelope_ (WLX+; WLX-)

Envelope (WLX+; WLX-)

7 COMB2_Envelope_ (LL1; LL2)

Envelope (WLX+; WLX-)

 8 COMB4(DL+COMB1+COMB2)

1 1.0 6 1.0 7 1.0

 Is there any commands in STAAD.Pro that can help me to do as method 2

 Appreciate your feedback soon,

 Thanks you in advance!

 Regards,