File Modification : I want to append some values in my property file

This is my property file

    ## Portal.Group=Security Role:Extranet Role
    Portal.Advisor=MAS:MAS,SRM:SRM,SIV:SIV,ADN:ADN,IFA:IFA,ACC:ACC,BSR:BSR,TRD:TRD,VOC:VOC,VFC:VFC,VFA:VFA,BDD:BDD,EFA:EFA,EAC:EAC,DDM:DDM,PFM:PFM,PDA:PDA,PAM:PAM
    Portal.Customer=CUS:CUS,CTU:CTU,CTM:CTM,AMR:AMR,FSS:FSS,GSV:GSV
    TC.SecurityRoles=MAS,SRM,SIV,ADN,IFA,ACC,EFA,EAC,CUS,DDM,CTU,CTM,PFM,PDA,PAM

I want to append this value `COA:COA,ALW:ALW` in Portal.Advisor

I want remove this value `CTU:CTU,CTM:CTM` in Portal.Customer

In Linux thorugh **sed** command I achieved this goal but now I need it in some windows based script. 